Serial message from Arduino to Processing

In the previous post the example only demonstrate message being sent from Processing to Arduino, in thie example it is the other way around, sending message from Arduino to Processing. This require a little bit formatting from the Arduino side since the serial message could be very complex.
The code here use "===" as separator and ";" as message termination.

Arduino Code

/*
 * Button
 * by DojoDave <http://www.0j0.org>
 *
 * Turns on and off a light emitting diode(LED) connected to digital  
 * pin 13, when pressing a pushbutton attached to pin 7. 
 *
 * http://www.arduino.cc/en/Tutorial/Button
 */
 
int ledPin = 13;                // choose the pin for the LED
int inputPin = 2;               // choose the input pin (for a pushbutton)
int inputPin2 =3;
int val = 0;                    // variable for reading the pin status
int val2 = 0;                    // variable for reading the pin status

void setup() {
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare pushbutton as input
  pinMode(inputPin2, INPUT);     // declare pushbutton as input  
  digitalWrite(inputPin, HIGH);
  digitalWrite(inputPin2, HIGH);  
  Serial.begin(9600);
}

void loop(){
  val = digitalRead(inputPin);  // read input value
  val2 = digitalRead(inputPin2);  // read input value  
  
  if (val == LOW) {            // check if the input is HIGH
    Serial.print("===1");
    digitalWrite(ledPin, LOW);  // turn LED OFF
  } else {
    Serial.print("===0");    
    digitalWrite(ledPin, HIGH); // turn LED ON
  }
  if (val2 == LOW) {            // check if the input is HIGH
    Serial.print("===1;");
    digitalWrite(ledPin, LOW);  // turn LED OFF
  } else {
    Serial.print("===0;");    
    digitalWrite(ledPin, HIGH); // turn LED ON
  }  
  Serial.flush();
  
  
}

Processing Code

/**
 * Simple Read
 * 
 * Read data from the serial port and change the color of a rectangle
 * when a switch connected to a Wiring or Arduino board is pressed and released.
 * This example works with the Wiring / Arduino program that follows below.
 */


import processing.serial.*;

Serial port;  // Create object from Serial class
int val;      // Data received from the serial port

void setup() 
{
  size(200, 200);
  frameRate(10);
  // Open the port that the board is connected to and use the same speed (9600 bps)
  port = new Serial(this,"COM16", 9600);
}

int buttonStatus=0;
void draw()
{
  String serialMsg="";
  if (0 < port.available()) {  // If data is available,
    serialMsg = port.readStringUntil(char(';'));         // read it and store it in val
//    println("serialMsg: "+serialMsg);
  }
  if (serialMsg.split("===").length>2){
    println("serialMsg: "+serialMsg);
//    println("parsedMsg: "+serialMsg.split("===")[1].charAt(0));
    println("status 1: "+int(serialMsg.split("===")[1].charAt(0)-48));
//    println("parsedMsg: "+serialMsg.split("===")[1].charAt(0));
    println("status2: "+int(serialMsg.split("===")[2].charAt(0)-48));    
    buttonStatus=int(serialMsg.split("===")[1].charAt(0)-48);

  }
    port.clear();  
  
  background(255);             // Set background to white
  if (buttonStatus == 0) {              // If the serial value is 0,
    fill(0);                   // set fill to black
  } 
  else {                       // If the serial value is not 0,
    fill(204);                 // set fill to light gray
  }
  rect(50, 50, 100, 100);
}



/*

// Wiring / Arduino Code
// Code for sensing a switch status and writing the value to the serial port.

int switchPin = 4;                       // Switch connected to pin 4

void setup() {
  pinMode(switchPin, INPUT);             // Set pin 0 as an input
  Serial.begin(9600);                    // Start serial communication at 9600 bps
}

void loop() {
  if (digitalRead(switchPin) == HIGH) {  // If switch is ON,
    Serial.print(1, BYTE);               // send 1 to Processing
  } else {                               // If the switch is not ON,
    Serial.print(0, BYTE);               // send 0 to Processing
  }
  delay(100);                            // Wait 100 milliseconds
}

*/